Ms Bishop also ruled out imposing sanctions on Egypt, saying it was "not helpful at this stage".

Mr Sisi was elected last month, vowing to tackle "terrorism" and bring security.

The retired field marshal overthrew President Mohammed Morsi last July amid mass protests against his rule.

He has since been pursuing a crackdown on Mr Morsi's Muslim Brotherhood, which urged a boycott of the 26-28 May elections. Liberal and secular activists also shunned the poll in protest at the curtailing of civil rights.

'Unjust verdict'

Monday's jailing of the reporters has been condemned by media organisations and politicians around the world.

Media captionAustralian Foreign Minister Julie Bishop: ''We will continue to make representations at the highest level within the new Egyptian government''

In London, BBC staff were joined by colleagues from other news organisations in a one-minute silent protest outside New Broadcasting House in London.

The protest took place at 09:41 BST (08:41 GMT) - exactly 24 hours after the sentencing in Cairo.

"The verdict is unjust, the case is unfounded," the BBC's News Director James Harding told the gathering.

Image copyrightReutersImage caption
Peter Greste, a former BBC reporter, has been one of Australia's most high-profile foreign correspondents

Image caption
Solidarity protests were also held by BBC journalists around the world, including in Baghdad, Iraq

He added that journalists around the world "have to stand together" for reporters being imprisoned for simply doing their job.

Mr Harding added that journalists would be sending a letter to the Egyptian president, calling him to intervene.

'Foreign interference'

The father of Mr Greste told reporters in Brisbane that the family was "devastated" and "shocked" by the verdict.

"This is a very dark time, not only for our family but for journalism generally," Juris Greste said, describing the ruling as a "slap in the face" to "all fair-minded people around the world".

"Journalism is not a crime, or you should all be behind bars,'' he added.

But Mr Greste's parents were reluctant to criticise the Egyptian judicial system, reports the BBC's Jon Donnison in Sydney, aware that might hinder the ongoing diplomatic efforts to put pressure on the Egyptian government.

While reporting the verdict prominently, the traditional media have not criticised it, and, echoing the official line, have expressed rejection of "foreign interference" in Egypt's affairs.

However, the story has been met with shock and outrage on social media.

Al-Jazeera, which is based in Qatar, was banned from operating inside Egypt after being accused of broadcasting reports sympathetic to former President Mohammed Morsi and the Muslim Brotherhood. Al-Jazeera has consistently denied the allegations.

Eleven defendants tried in absentia, including three foreign journalists, received 10-year sentences. Two of the journalists convicted in absentia are British.